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<FONT color="green">001</FONT>    package org.hackystat.sensor.ant.vcs;<a name="line.1"></a>
<FONT color="green">002</FONT>    <a name="line.2"></a>
<FONT color="green">003</FONT>    import org.apache.commons.jrcs.diff.Chunk;<a name="line.3"></a>
<FONT color="green">004</FONT>    import org.apache.commons.jrcs.diff.Delta;<a name="line.4"></a>
<FONT color="green">005</FONT>    import org.apache.commons.jrcs.diff.Diff;<a name="line.5"></a>
<FONT color="green">006</FONT>    import org.apache.commons.jrcs.diff.Revision;<a name="line.6"></a>
<FONT color="green">007</FONT>    <a name="line.7"></a>
<FONT color="green">008</FONT>    <a name="line.8"></a>
<FONT color="green">009</FONT>    /**<a name="line.9"></a>
<FONT color="green">010</FONT>     * Diff counter, which wraps around JRCS diff engine. &lt;p&gt;<a name="line.10"></a>
<FONT color="green">011</FONT>     * Note that if this class is used to diff two text files, then empty lines and<a name="line.11"></a>
<FONT color="green">012</FONT>     * comments are considered in diff result. This may or may not be desired.<a name="line.12"></a>
<FONT color="green">013</FONT>     * Also note that if you try to diff two binary files, you either get an exception or<a name="line.13"></a>
<FONT color="green">014</FONT>     * an incorrect result.<a name="line.14"></a>
<FONT color="green">015</FONT>     * <a name="line.15"></a>
<FONT color="green">016</FONT>     * @author Qin ZHANG<a name="line.16"></a>
<FONT color="green">017</FONT>     * @version $Id: GenericDiffCounter.java,v 1.1.1.1 2005/10/20 23:56:56 johnson Exp $<a name="line.17"></a>
<FONT color="green">018</FONT>     */<a name="line.18"></a>
<FONT color="green">019</FONT>    public class GenericDiffCounter {<a name="line.19"></a>
<FONT color="green">020</FONT>    <a name="line.20"></a>
<FONT color="green">021</FONT>      private int linesAdded = 0;<a name="line.21"></a>
<FONT color="green">022</FONT>      private int linesDeleted = 0;<a name="line.22"></a>
<FONT color="green">023</FONT>      <a name="line.23"></a>
<FONT color="green">024</FONT>      /**<a name="line.24"></a>
<FONT color="green">025</FONT>       * Constructs this instance to diff two revisions.<a name="line.25"></a>
<FONT color="green">026</FONT>       *<a name="line.26"></a>
<FONT color="green">027</FONT>       * @param original The original version.<a name="line.27"></a>
<FONT color="green">028</FONT>       * @param revised The revision.<a name="line.28"></a>
<FONT color="green">029</FONT>       * @throws Exception If there is error in diff engine.<a name="line.29"></a>
<FONT color="green">030</FONT>       */<a name="line.30"></a>
<FONT color="green">031</FONT>      public GenericDiffCounter(Object[] original, Object[] revised) throws Exception {<a name="line.31"></a>
<FONT color="green">032</FONT>        Diff dfEngine = new Diff(original);<a name="line.32"></a>
<FONT color="green">033</FONT>        Revision revision = dfEngine.diff(revised);<a name="line.33"></a>
<FONT color="green">034</FONT>    <a name="line.34"></a>
<FONT color="green">035</FONT>        for (int i = 0; i &lt; revision.size(); i++) {<a name="line.35"></a>
<FONT color="green">036</FONT>          Delta delta = revision.getDelta(i);<a name="line.36"></a>
<FONT color="green">037</FONT>          Chunk fromChunk = delta.getOriginal();<a name="line.37"></a>
<FONT color="green">038</FONT>          Chunk toChunk = delta.getRevised();<a name="line.38"></a>
<FONT color="green">039</FONT>          this.linesDeleted += fromChunk.size();<a name="line.39"></a>
<FONT color="green">040</FONT>          this.linesAdded += toChunk.size();<a name="line.40"></a>
<FONT color="green">041</FONT>        }<a name="line.41"></a>
<FONT color="green">042</FONT>    <a name="line.42"></a>
<FONT color="green">043</FONT>        //Following is redundant, it only serves to check whether diff is correct.<a name="line.43"></a>
<FONT color="green">044</FONT>        //Since the version of JRCS used is not final, double-checking is always good.<a name="line.44"></a>
<FONT color="green">045</FONT>        Object[] reco = revision.patch(original);<a name="line.45"></a>
<FONT color="green">046</FONT>        if (!Diff.compare(revised, reco)) {<a name="line.46"></a>
<FONT color="green">047</FONT>          throw new Exception("JRCS Diff internal error: files differ after patching.");<a name="line.47"></a>
<FONT color="green">048</FONT>        }<a name="line.48"></a>
<FONT color="green">049</FONT>        //END OF redundant code<a name="line.49"></a>
<FONT color="green">050</FONT>      }<a name="line.50"></a>
<FONT color="green">051</FONT>    <a name="line.51"></a>
<FONT color="green">052</FONT>      /**<a name="line.52"></a>
<FONT color="green">053</FONT>       * Gets the lines added.<a name="line.53"></a>
<FONT color="green">054</FONT>       *<a name="line.54"></a>
<FONT color="green">055</FONT>       * @return The number of lines added.<a name="line.55"></a>
<FONT color="green">056</FONT>       */<a name="line.56"></a>
<FONT color="green">057</FONT>      public int getLinesAdded() {<a name="line.57"></a>
<FONT color="green">058</FONT>        return this.linesAdded;<a name="line.58"></a>
<FONT color="green">059</FONT>      }<a name="line.59"></a>
<FONT color="green">060</FONT>    <a name="line.60"></a>
<FONT color="green">061</FONT>      /**<a name="line.61"></a>
<FONT color="green">062</FONT>       * Gets the lines deleted.<a name="line.62"></a>
<FONT color="green">063</FONT>       *<a name="line.63"></a>
<FONT color="green">064</FONT>       * @return The number of lines deleted.<a name="line.64"></a>
<FONT color="green">065</FONT>       */<a name="line.65"></a>
<FONT color="green">066</FONT>      public int getLinesDeleted() {<a name="line.66"></a>
<FONT color="green">067</FONT>        return this.linesDeleted;<a name="line.67"></a>
<FONT color="green">068</FONT>      }<a name="line.68"></a>
<FONT color="green">069</FONT>    }<a name="line.69"></a>




























































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